Why do broken down pieces of rock have more surface area then larger pieces?

Broken down pieces of rock have more surface area than larger pieces because the process of breaking creates additional surfaces that were previously internal. Each fragment exposes new surfaces that were not visible in the larger, intact rock. As the size of the rock decreases, the ratio of surface area to volume increases, resulting in a greater total surface area for smaller pieces. This increased surface area can enhance weathering and chemical reactions, making smaller fragments more reactive.